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Expired European patentEurope

Improved catalysts for the hydrogenation of maleic acid to 1,4-butanediol

EP 1077080 B1 · Applicant: The Standard Oil Company

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Overview

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed August 18, 1999 and granted November 22, 2006. A European patent lasts at most 20 years from filing, so its term ended August 18, 2019.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by February 18, 2025.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledAugust 18, 1999
PublishedFebruary 21, 2001
GrantedNovember 22, 2006
Term endedAugust 18, 2019
Application numberEP 99306525
Classification (CPC)B01J37/0207 +2 more

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedAug 18, 1999PublishedFeb 21, 2001Patent grantedNov 22, 2006Term endedAug 18, 2019

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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